Apparatus for recording the delivery of measured quantities of liquids



June 30, 1931? D. L. WRAY ET AL APPARATUS FOR RECORDING THE DELIVERY OFMEASURED QUANTITIES OF LIQUIDS Filed Sept. 8 1930 8 Sheets-Sheet l June30, 1931. D. 1.. WRAY ET AL 1,812,576

APPARATUS FOR RECORDING THE DELIVERY OF MEASURED QUANTITIES OF LIQUIDSFiled Sept. 8, 1950 8 Sheets-Sheet 2 INVENTORY Fig. 10.

June 30, 1931. D. 1.. WRAY ET AL 1,812,576

APPARATUS FOR RECORDING THE DELIVERY OF MEASURED QUANTITIES OF LIQUIDSFiled Sept. 8, 1930 8 Sheets-Sheet 3 Fig. 4.

Fig. 5.

/N VE/V TORS 5 m WTTOR/VL'Y June 30, 1931. D. WRAY ET AL APPARATUS FORRECORDING THE DELIVERY OF MEASURED QUANTITIESOF LIQUIDS L /NVENTORS.

Filed Sept. 8, 1930 8 Sheets-Sheet 4 flame 30, 1931., D. L. WRAY ET AL1,812,576

APPARATUS FOR RECORDING THE DELIVERY OF MEASURED QUANTITIES OF LIQUIDSFiled Sept. 8 1930 8 Sheets-Sheet 5 Fig].

June 30, 1931. L WRAY ET AL 1,812,576

APPARATUS FOR RECORDING THE DELIVERY OF MEASURED QUANTITIES OF LIQUIDSFiled Sept- 8. 1950 8 Sheets-Sheet 6 w 6'? Wmmvav June 30, 1931.1,812,576

APPARATUS FOR RECORDING THE DELIVERY OF MEASURED QUANTITIES OF LIQUIDSD. L. WRAY ET AL Filed Sept. 8, 1930 8 SheetsSheet 8 X/y Y 152156154 f m0 V 81/ w a A 4 I w F W V MWMWWQTTORNEY Patented June 30, 1931 UNITEDSTATES DANIEL LESLIE WRAY, OF

PATENT orrlca V SHOREHAM-BY-SEA, AND HAROLD GUY GHRISMAS, F

CRANLEIGH, ENGLAND I Application filed September 8, 1930, Serial-No.480,546, and in Great Britain September 5, 1929.

p This invention relates to apparatus for delivering measured quantitiesof liquid, for example motor fuel or oil, of the kind which includes aliquid-delivering pump having a piston which returns to the samestarting position after every complete liquid-delivering operation. Theinvention is in no way concerned with liquid-delivering apparatus ofother types, for example those which deliver liquids from bottles orthose which include a variable-volume measuring chamber which is filledand emptied by gravity.

The object of the invention is to provide recording mechanism fordelivering-appara- ,15 tus of the kind referred to which recordingmechanism. will be set automatically in accordance with the amount ofliquid delivered and actuated by hand or otherwise.

A further object is to accurately indicate what particular amount offluid a particular individual draws from a pump at any time, whereby apositive check may be kept on the employees at a fluid dispensingstation.

According to this invention a movable type-carrier (for example atype-wheel is operatively connected to the pump-piston in such a manneras to advance in step-by-step fashion, one step for each predeterminedunitary pumping movement of the pump piston,

'30 and a single actuating member arranged to impress the type upon therecord-sheet and to return the type carrier to zero position in a singleoperation.

There may be a plurality of liquid-delivering pumps and a plurality oftype carriers, one for each pump, mounted together remote from the pumpsand arranged to effect printing independently of one another on a singlerecord-sheet, but it is within the scope of the invention to mount therecording mechanism on the pump itself, in which case themanually-operable actuating member may take the form of an insertiblekey, which may serve to unlock the normally locked delivery means.Several such keys may be provided, difl'erently shaped so that eachactuates a separate one of a set of additional type-elements, therebyrecording the fact that a particular ke was used as 50 well as makingrecord of t e amount delivered. Preferably thearrangement is such thatthe key, once inserted, cannot be withdrawn until the recordingoperation has been completed.

Preferably the step-by-step movement of the type carrier is eflected byan electromagnet under the control of a switch actuated by the pump as aconsequence of the delivcry of liquid. v

It is preferred also to provide a signal (for example an electric lamp)which is operated as a consequence of the setting of the type, therebyinforming the attendant that the recording mechanism is ready foractuation.

Two practical embodiments of the above and'other features of theinvention will now be described by way of example, with reference to theaccompanying drawings, in which Figure l is a view of a petrol pump ofknown type carrying the attachment by which the recording apparatus isactuated,

Figure 2 is aside elevation partly 'in section of a. part of one of therecording units in the normal or resting position,

*Figure 3 is a view similar to Figure 2 with the parts in the positionswhich they occupy when petrol has been delivered but before the printingoperation,

Figure 4 is a side elevation of a complete unit, I

Figure 5 is a side elevation of the cashdrawer mechanism,

Figure 6 is a side elevation of the switch attachment to the pump,

Figure 7 is a plan, with the top of the casing removed, of a battery offour units,

Figures 8 and 9 are detailviews of a part of the recording mechanism,

Figure 10 is a circuit diagram,

Figure 11 is a diagrammatic side elevation showing the paper-feeddevices used when it is desired to issue tickets or vouchers, one foreach transaction,

Figure 12 is a view of a part of a petrol pump with an attachmentembodying an alternative form of the invention,

Figure 13 is a side elevation partly in section of the attachment withthe parts in the normal position,

Figure 14 is a view similar to Figure 13 with anactuating key inserted.

Figure 15 is a cross-section along the line XVXV- in Figure 14, someparts being omitted for the sake of clarity,

(Fiigure 16 is a view of the actuating key, an

Figure 17 is a plan of a detail of the latching mechanism.

, The apparatus to be described with reference to igures 1. to 10comprises recording mechanism'in a situation remote from the petrolpump, which is provided with a small switchattachment operated by thecrank of the-pump. When the crank is operated a circuit leading to therecording mechanism is closed, a type-wheel is set in accordance withthe amount of petrol delivered, a signal lamp is lighted, and the manualactuating handle 'i's-unlatched', which handle, when operated,

prints the amount, price, etc., of petrol delivered and unlocks acash-drawer. The return of the handle tonormal position automaticallycauses the type-wheel to be re-set to zero, the handle to here-latchedand the signal lamp to be extinguished. The cash drawer is relockeduponbeing pushed home.

A. number of petrol-pumps, each provided with a switch attachment, maybe connected to a multiple recording mechanism, comprising severalrecording units each independently connected to a separate pump butrecording on a single record roll and having a single cash drawer commonto them all.

Figures 2, 3 and 4 illustrate a single recorder unit, while in Figure 7four such units are shown grouped together in a single casing, with asingle cash drawer common to the four units.

Each unit comprises a type wheel 10 carried-in bearings in a frame 12pivoted at 14. The lower end of each frame-normally rests on a stop 16which limits its downward movement, and printing is effected bydepressing the outer projecting end of a pivoted lever 18 the inner endof which engages beneath the bearing boss 20 on the frame 12. Thismovement raises the frame, thus causing the wheel 10 to be pressedagainst the paper strip 22' (Figure 4) supported on the platen 24. Thepaper strip is wide enough to receive the impressions from all thetype-wheels in the casing 26, and an ink ribbon 28 extends the fulllength of the platen between the paper and the type. 1

A frame 30 (Figures 4' and 7 is pivoted within the casing at 32 and abail 34 carried by the frame overlies the frame 12. A hook 40 ispivotally connected'to the frame 30.

i 1 The lower end of this hook normally rests against a pin When any oneof the frames 12 is raisedthe frame 30 will be lifted, thus raising thehook 40 sufficiently far for its lower end to clear the pin 42. Thespring then swm 44 igures 4, 5 and 7) on a pivoted detent 46 (Figure 5)which normally engages a notch 48 in the edge of thecash drawer andholds it shut. When the frames 12 and 30 I return to their normalpositions, the hook 40 will pull the upper end of the detent 46downwards against the tension of a spring 50, thus raising its lower endout of engagement with the notch 48, and thereby releasing the drawer.The lower end of the hook 40 is bevelled as shown. During the returnmovement this bevelled end rides over the pin 42 and returns the hook toits original position.

The bent end 52 of a sliding spring-pressed bar 54 is engaged by a bar56 fixed to the drawer, the spring tending to open the drawer, whichtherefore springs open when the detent 46 is raised. A pawl 58 pivotedto the bar 54 and controlled by a spring 60, 00- operates with aratchet-wheel 62 fixed to the spindle of a paper-feed reel 64, so thateach time the drawer springs open, that is to say immediately after eachprinting operation, the paper is fed a short distance to present a freshspace to the type. A cam 66 manually operated by a knob 67,'is providedwhich when turned moves the pawl 58, and also a retaining pawl 68, outof engagement with the ratchet-wheel, to facilitate the removal of thefinished record wound on the reel 64.

Each type-Wheel is urged in an anticlockwise direction, as seen inFigures 2, 3 and 4, by a coiled spring 70 (Figure 3), and it carries aninternally-toothed ratchet-wheel 72 engaged by a spring-pressedretaining pawl 74 and an operating pawl 76.

The latter is carried pivotally on the short arm of a bell-crank 78 (seealso Figures 8 and 9) the other arm 80 of which extends downwardly andis connected by a spring 82 to the frame 12. The lower end of the arm 80is engaged by a pin 84 on the armature 86 of a solenoid 88 which whenenergized moves the armature to the right and thus rotates thebell-crank anticlockwise. The pawl 76 will thusengage-the next-tooth ofthe ratchetwheel. When the solenoid is de-energized the spring 82 willrotate the bell-crank in the clockwise direction, causing the awl 76 torotate the ratchet-wheel, and wit it the type-wheel, one tooth space.The retaining pawl will hold the type-wheel in this osition, and asubsequent energization o the solenoid will in the same way cause thetypewheel to advance a further tooth space. The

bell-crank 78 is provided with a triangular s the hook into engagementwith a pin' thus closing the switch. Whenthe tooth of thecam'has passedthe end of the lever the switch returns tothe open position, which isthat shown in Figure 6. Themercury switch is placed in the circuit ofthesolenoid 88,

which is thus momentarily energized once for each half-gallon of petroldelivered.

Figure 2 shows the position of the parts before petrol has beendelivered. It will be noted that both pawls 7 6 and 74 are out ofengagement with the ratchet-wheel 72, a pin 104 on the pawl 76 restingon an upward extension 106 of the armature 86 which-maintains this pawlout of engagement, while an upward extension 59 of/the pawl 76 engagesthe pawl '74 and keeps it out of engagement. When the solenoid isenergized the extension 106 is withdrawn from beneath the pin 104, thusallowing both pawls to spring into engagement with the ratchet-wheel.Thereafter, on de-energization of the solenoid, the pawl 76 rotates thetype-wheel one tooth space as already described. The parts then assumethe position shown in Figure 3.

Referring again to Figure 2, a pin 108 on the type-wheel bears againstthe underside of one arm of a three-armed lever 110, and holds it in theposition shown against the pressure of a blade spring 112 bearingagainst the right-hand arm of the lever. The downward arm of the leveris formed with a notch which takes'over a part 114 of the lever 18 andprevents this lever from being operated. The spring 112 is a contactspring for on electric lamp 116 (Fig. 10). When the typewheel moves onetooth space the pin 108 moves downwards, thereby allowing the lever 110to rock anti-clockwise under the influence of the spring 112. This notonly releases the lever- 18 but also allows the spring 112 to makecontact with the terminal 118- of the lamp which thereupon lights up. Itwill thus be clear that the lever 18 cannot be operated until at leastone half-gallon has been delivered, and that the factthat petrol isbeing or has been delivered is indicated by the lighting-up of the/lamp.

When delivery has been completed the handle 18 is operated as alreadydescribed.

' This lifts the type-wheel with the result that the pin 104 is raisedand the bell-crank 78 moves the armature 86 to the left; after printing,the pin 104 will rest on the extension 106, thus releasing both pawlsand allowing the type-wheel to return to zero under the action of thesprin 70, the pin 108 rockin the lever 110 cloc wise and once more locing the lever 18 and extin uishing the lamp. This pin 108 serves as t ezero stop for the type-wheel.

The type-wheel carries typeindicating the amount and price of thequantity of petrol delivered, together with the number of the pump andany other relevant information which it may be desired toprint, and thetype-faces are preferably made readily interchangeable to provide forchanges of price and other varying factors.

Figure 10 illustrates the arrangement 01 circuits. Current is obtainedfrom an ac cumulator 120 having a two-volt and a sixvolt tapping. Thefour lamps 116 and their contacts 112-are shown at the top of the figureconnected in parallel across the two-volt terminals. The solenoids 88,in series each with its mercury switch 102, are connected in parallel tothe negative terminal of the accumulator and to its six-volt terminalthrough the pump casings, represented as earth connections.

Figure 11 illustrates diagrammatically, a modified construction usedwhen it is desired to print a duplicate record on paper strip which isdelivered out of the casing to be torn off, thus providing tickets orvouchers. For this purpose a reel 122 of paper strip is provided whichstrip passes between feedrollers 124,one of which is of large diameter,then through a curved guide 126, beneath the platen 24 and out through aslot 1.28 in the top of the casing. The larger of the two feed rollerscarries a small sprocket-wheel 130 connected by a chain 132 to a largesprocketwheel 134 on the paper-feed reel 64. Thus each movement of thereel 64 will feed the strip a greater distance than the paper. The gearratio is preferably such that the movement of the strip is about sixtimes that of the paper. type and the strip and back between the stripand the paper, so that both the strip and the paper receive impressions.

In the construction illustrated in Figure 11, and also in thatillustrated in Figure 4, the paper passes over a flat support 136immediately beneath an opening 138 in the casing. This opening iscovered by a glass sheet 139 in which a slot 139a is cut (Figs. 4,11, 13and 14), thus enabling the operator to .write on the record.

Figures 12 to 17 illustrate a modified form of the invention. The wholeapparatus is attached to the pump and it servesto make it The ink ribbon28 is led between the impossible to deliver petrol without making iscribed.

with any recognized cash recording system and to serve as an additionalcheck on such system.

Each employee is provided with a numbered key 140 (Figures 14 and 16)which must be inserted into the apparatus before petrol can bedelivered. 'When inserted it serves as a lever to effect printing and itcannot be withdrawn until printing has been effected.

The apparatus comprises two attachments, one of which consists of a cam142 (Figure 12) on the rack-actuating pinion and a lever 144 pivoted ina. box 146, these parts being similar to the parts 90, 96, and 98already de- The lever 144 does not operate a switch, however, but isconnected to a Bowden cable 148 by means of which the typewheel isoperated. The. other attachment is a recording unit generally similar tothat already described. It is enclosed in a metal box 150 fixed to thepump platform as shown in Figure 12. There is no solenoid, but insteadthe ram 80 of the bell-crank 7 8 is terminated by a cross-piece 152(Figs. 13 and 14) lying in the path of an upward projection 154 ofaspring-pressed slide 156. It should be mentioned that in Figures "13 and14 the recording apparatus is shown as seen from the side opposite tothat shown in Figures 2, 3 and 4, so that the type-setting movement ofthe arm 80 under the influence of the spring 82 is to the right, oranticlockwise, instead of to the left as in the other figures. Thespring 82 is not shown in Figures 13 and 14; it is anchored to a fixedpart of the apparatus, since the frame 12 is not used in this modifiedconstruction, This frame 12, in

fact, is replaced by a hollow lever 158 pivoted at 160 urged downwardsby a spring 161. The mouth of the hollow lever is flush with one end ofthe box near its pivot, as shown. ,The key 140 is thrust into the boreof the lever, and this action causes the plunger of the petrol-pump tobe unlocked, locks the key in the lever and enables the lever to beraised toefi'ect printing, after which the key is released and can bewithdrawn. The means for bringing about these results will now bedescribed.

The forward end of the key first encounters a pivoted spring-pressedlatch 162 (see also Figure 17) and thrusts it aside. This releases theend of a spring-pressed arm 164, normally held in a notch 166 in thelatch, which projects into the bore of the lever through a slot. Furthermovement of the key swings the arm 164 clockwise until its end finallysnaps into a notch 168 in the un der'side of the key. Until the arm isreleased from this notch it prevents the withdrawal v D or othercharacter to be printed to lndlcate of the key.

The arm 164 is fixed to a'spindle 170 which projects beyond the side ofthe box and carries an arm 172 (see Figure 12) connected by a link 17 4to a ivoted hook 17 6 normally held by a. spring 1 8 above a pin l80fixed to the pump plunger. So long as the hook is above the pin 180 thepump cannot be operated, but when the arm 164 has been moved by the keyinto the position shown in Figure 14 the hook is held out of the path ofthe pin and petrol can be delivered.

A further arm 182 is pivoted at 184 to the hollow lever, its upper endbeing in the path of the end of the key, and its lower end carrying apin 186 which enga es the lower end of 2. depending bar 188, a sopivoted to the tubular lever, which bar has a. notch 190 in its edge.Normally the bar 188 is, held in the position shown in Figure 13, butwhen the key is inserted it is allowed to swing down until its edge,just above the notch 190, rests against a pin 192 carried by the arm164, as shown in igure 14.

With the parts in the position shown in Figure 14, it will be seen thatthe type-wheel 10 will be raised to print on the paper 22 when the outerend of the key is depressed. During thisloperation the bar 188 is raisedsufficiently to enable the notch 190 to engage the pin 192. During thereturn downward movement of the hollow lever the bar 188 will thereforeswing the arm 164 sufiiciently to remove its tip from the notch 168 inthe key, thus releasing the key. During this movement a slide 194,connected to the hollow lever by a pin and slot, is raised and lowered.This slide carries a pawl 196 which during "the downward movementrotates a ratchet 198 attached to the paper feed reel, thus feeding thepaper one line space.

When the pump is operated, the lever 144 is operated once for each halfgallon delivered. The Bowden cable 148 is connected at its lower end toan arm 200 (Figures 12 and 15) secured to a spindle 202 which carries adownwardly-extending arm 204. The lower end of this arm engages afurther projection 206 on the slide 156,-thus moving it to the left andthereby moving the arm 80 also to the left, and allowing it to return,once for each half gallon delivered.

The type-wheel is reset to zero in the following manner. The pin 104 onthe pawl 76 (previously. described with reference to Figures 2 and 3)encounters during its downward movement the upper end of a pivotedweighted detent 208 in the form of a bellcrank, which operates toreleasethe two pawls 76 and 74, just as does the part 106 in the modificationshown in Figures 2,3 and 4. The detent is rocked intothe osition shown.in dotted lines in Figure 15 y a cam 210 fixed to the slide 156.

Eachkey 140is intended to cause a figure ently at 214. These carrytypesfaces 216 to print the required indication, and their lower endsare in echelon, as clearly shown, within the bore of the hollow lever158. The key 140 shown, in the .drawings has its extremity 218 so shapedas to en 'age only the longest type-lever, that is the left-hand one inFigure 15, so that when the outer end of the key is depressed only thattype-lever is raised to impress the paper. Each of the 7 other keys isshaped to engage a different one of the type-levers, so that each causesa separate number or other character to be printed. The type-levers areindependentof the type-wheel, which is actuated always in the same wayby every key.

The apparatus described with reference to Figures 12 to 17 is applicableto oil-cabinets parent.

We claim 1. In combination with a liquid-measuring delivery pump,recordingmechanism comprising a type wheel, means for rotating said typewheel step-by-step against resilient restraint to set the type thereof,a pivoted lever constituting a manually operable actuating member andadapted when operated to move the type wheel bodily, a detent for thelever, a notch in the lever to receive the detent, a spring urging saiddetent'into a non-detaining position, a projection on the type wheeladapted to engage said detent when the type wheel is in the zeroposition and to ,hold it in lever detaining position and a paper supportto receive the impress of the type when the type wheel is moved bodilyas aforesaid.

2. In combination, a liquid measuring delivery pump, recording mechanismcomprising a type wheel, means for rotating said type wheel step-by-steagainst resilient restraint to set the type or recording, a springpressed lock normally preventing the operation of the pump,--a piyotedhollow lever connected to said type wheel and serving as a socket for aninsertable key and cooperating therewith to constitute an actuatingmember for moving the type wheel bodily against the record blank, and amember adapted to be encountered and actuated by the key when insertedand operatively connected to the spring pressed lock to place the saidlock in a non-locking position.

3. A recordingdevice including a casing, a type wheel rotatably mountedin said casing and having an internal ratchet gear, a reciprocablemember, a projection on said member, a bell crank lever pivoted at theaxis of said type wheel and actuated by said projection on saidreciprocable member, an operating pawl pivotally connected to said bellcrank lever and capable of engagement with the teeth of said ratchetgear for rotat-. ing the type wheel upon reciprocation of said member,said ke having an en reciprocable member, a spring urged retaining pawl,an upstanding extension on said reciprocable member, and a pivotedmanually operable actuating member for movin said type wheel intoprinting position, sai upstanding extension engaging said operating awland releasing said operating and detaining pawls from engagement withsaid ratchet gear.

4. In a recording device, a casing, a pivoted hollow actuating member insaid casing, a recording mechanism including a type wheel rotatablyconnected to said hollow member, a plurality of auxiliary type carrierspivotally connected to and arranged to partially project into saidhollow member and havingtype characters to indicate the individualoperating said recording device, and a key insertable in said hollowmember and adapted to cooperate therewith to form the manually actuatingmember, said key having an end projection to engage selectively with oneof said auxiliary type carriers to position the properly selected typecarrier in printing position so that the individual operating saidrecorder may be designated upon the actuation of said hollow member andthe printing of characters on said type wheel and auxiliary t pecarriers.

5. In a recording evice, a cam'n a pivoted hollow actuating member insai casing, a recording mechanism includin a type wheel rotatablyconnected to said ho low member, a plurality of auxiliary type carrierspivotally connected to and arranged to partially project into saidhollow member to position a properly selected type carrier in printingposition so that the individual operating said recorder ma be designatedupon the actuation of said ollow member and the printing of characterson said type wheel and auxiliary type carriers, 3. key insertable insaid hollow member and adapted to cooperate therewith to form themanually actuating projection to engage selectively with one of saidauxiliary type carriers, said carriers having type characters toindicate the individual operating said recordin device, a spring pressedlatch, and a mem r normally held by said latch in a locked position andactuated by said key to unlock the recording mechanism.

6. In a recording device, a casing, a piv oted hollow actuating memberin said casing, a recording mechanism including a type wheel rotatablyconnected to said hollow member, a plurality of auxiliary L-shaped typecarriers pivotally connected to and arranged to partially project intosaid hollow member, a key insertable in said hollow member andcooperatin therewith to constitute an' actuating mem r for moving thetype wheel and .one of said auxiliary type carriers bodily against therecord sheet, said key having an end projection to engage selectivelywith one of said auxiliary type carriers to position the properlyselected type carrier in printing position so that the person operatingsai recorder may be designated upon the actuation of said hollow memberand the printing of characters on said type wheel and auxilia typecarriers, a spring pressed latch for oldi'ng the recording mechanism ina locked position, a member adapted to be en-' countered and actuated bysaid key to place the recording mechanism in an unlocked position, alatch recess in said key to receive the said member and lock the key inoperative position, and another member having a latch recess to receivea projection on the said member upon actuating the said hollow member toa printing position, said first mentioned member being withdrawn fromsaid recess in said key upon release of said actuating hollow member andthe recording mechanism being returned to the locked position.

7. In a recording device, a casing, a pivoted hollow actuating member insaid casing, a recording mechanism including a type wheel rotatablyconnected to said hollow member and a plurality of auxiliary L-shapedtype carriers pivotally connected to and arranged to partially projectinto said hollow member, a key insertable in said hollow member andcooperating therewith to constitute actuated by said key to an unlockeda pump piston, a projection on said iston, an L-shaped pivoted springocking member normally bearing agamst that upon the unlatc ing of thelast men-' tioned member by the insertion of said key, the pump is putin an unlocked position.

position,

In witness whereof we hereunto subscribe our names this 26th day ofAugust, A} D.

DANIEL LESLIE WBAY.

HAROLD GUY CHRISMAS.

an actuating member for moving the type wheel and one of said auxiliarytype carriers bodily against the record sheet, said key having an endprojection to engage selectively with one of. said auxiliary t pecarriers, a spring pressed lat-ch "forholdmg the recording mechanism ina locked position, a member adapted to be encountered and actuated bysaid key to place the recording mechanism in an unlocked position, alatch recess in said key to receive the said member and lock the key inoperative position, another member having a latch recem to receive aprojection on the said member upon actuating the said hollow member to aprinting position, said first mentioned member being withdrawn from saidrecess in said key upon release of said actuating hollow member and therecording mechanism being returned to the locked position, and a memberoperatively connected and actuated by said manually operable hollowmember'to advance the paper feed reel one space.

8. In combination with a liquid measuring delivery pump, recording,mechanism comprising a type wheel, means for rotating said type wheelstep by step against resilient restraint to set the type for recording,a pivoted hollow lever connected to said type wheel and serving as asocket for an insert able key and cooperating therewith to con stitutean actuating member for moving the type wheel bodily against the recordblank, a spring pressed latch, a member normally held by said latch in alocked position and

